import java.util.Arrays;

public class testDemo {
    public static void oddExcgeven(int[] array) {
        int left = 0;
        int right = array.length-1;
        while(left < right) {
            while(left < right && array[left] % 2 == 1) {
                left++;
            }
            while(left < right && array[right] % 2 == 0) {
                right--;
            }
            if(left < right) {
                int tmp = array[left];
                array[left] = array[right];
                array[right] = tmp;
            }
        }
    }
    public static void main(String[] args) {
        int[] array = {1,1,3,5,7,9};
        oddExcgeven(array);
        System.out.println(Arrays.toString(array));
    }
}
